Machine for whetting razor blades



E. K. F. HEYDENBLUTH. MACHINE FOR WHETTING RAZOR BLADES.

APPLICATION FILED MAYIZ, 19 21.

Patented Feb. 28, 1922.

UNITED STATES PATENT OFFICE.

ERICH KARL FRIEDRICH HEYDEMBLUTH, or HAMBURG, GERMANY, ASSIGNOR TO THE FIRM 0F- HANSEATISCHE TRIUMPH-WERKE GESELLSGHAFT' MIT BEsoImANK- 'IER HAIFTUNG, or HAMBURG, GERMANY.

MACHINE FOR WHETTING RAZOR BLADES.

To all whom it may concern:

'Be it known that I, ERICK KARL FRIED- RICH HEYDENBLUTH, a citizen of Germany, residing, at .Hamburg, Germany, have invented certain new and useful Improvements in Machines for Whetting Razor Blades,

for which application has been made in ermany April 29, 1920,) of which the following is a.speoification.

The present invention refers to a machine for whetting, honing and stropping razor blades, in which a numberof blades are carried along by an endless metal band, past whetting disks in such manner that the blades are honed and stropped in one operation.

According to this invention the endless band together with the razor blades is drawn between two immovable rigid guide-rails in such manner that these rails prevent any oscillation or vibration of the blades, while being operated upon by the whetting disks, with the object of producing a keen sharp edge on one or both sides of the blades.

In the drawing a machine is shown to suitably 'carry out the present invention.

v Fig. 1 is an elevation of the machine, parts being broken away and other parts hemg shown in section for sake of clear illustration.

Fig. 2 is a cross section of the machine shown in Fig. 1 drawn to a large scale.

' Fig, 3 is a cross section of the guiding rails drawn to a still larger scale.

Fig. is a plan view of the rails partly in section. 1

Fig. 5 is a longitudinal section of the lower rail and Fig. 6 shows a driving bolt in three different positions.

In the machine selected to illustrate the inventionthere is provided, aframe a, at the ends of which two disks or drums b are journaled around which runs an endless metal band 0 preferably of steel, as is well known per se. On the upper part of the frame a a rail d is firmly attached, provided on its upper side with a longitudinal shallow groove 7, of the breadth and the depth of the endless band and a deeper narrower groove 9 for the purpose hereinafter described. Above the rail 05 a second rail h is also firmly attached to the frame a by any well known means. The

Specification of Letters Patent. Pat t d F 2 192 Application filed May 12,

1921. Serial No. 468,969.

two rails (Z and h are such a small distance 7:: apart, corresponding to the thickness of the razor blades that they are adapted to allow these bladesm to pass between them. The endless band 0 is provided with a number of holes 0, and similar holes 0 are provided in the blades m at such distance apart that two holes are in each blade. Into the holes 0 of the metal band and the holes 0 of the blades fit the driver bolts n guided with their lower part in the groove 9 of-the lower rail (1 and with the. upper part in the groove z of the upper rail. The driver bolt-s, 1

which fit in the grooves g and 2' are provided with flanges n at the lower end to prevent the rotation within the groove g. These bolts are inserted into the endless band from inside out in such manner that. the upper part of the bolts projects out. Before entering the space between the rails d and h the blades m to be whet-ted are filed on the bolts 12, as is shown in Figs. 4 and 5, so that each'blade is held by two bolts and on forward movement of the band 0 are driven valong between the two rails d and h; Above and below the rails cl and h a convenient number of whetting disks are journaled alternatively to the right and the leftof the centre line of the rails in sets of two, four or more disks. Thus in the machine selected for illustration, three sets of disks p, Q and r are provided, each set consisting of four disks, one operating on one side edge of the blade, the second on the same, edge from above, the third disk operating on the edge of the other side from below and the fourth disk operating on the last named edge from above. In the machine shown the disks p are supposed to be adapted to hone the blades'to roughly grind them. The disks Q are supposed to be,adapted to finally hone or polish the blades on the edges ground by the disks 7) and the disks 1' are adapted to strop the sharp edges honed or polished by the other disks.

The disks p, q and 7' are rotated in the desired direction by any driving means well known by any expert and also the rotation tances apart to allow the disks 1), g and r to project into the rails to conveniently operate on the blades m.

The operation of the machine is as follows: The unsharpened blades are filed on the bolts n projecting out from the band 0 at the front end 8 of the machine. To permit this the upper rail h is suflicientlyishorter than the lower rail 03. The band 7 by the aid of the projecting bolts n carries the blades alon between the rails d and h, first past the isks p which operate on the blades to give them a rough whetting or honing, whereupon they are carried to the disks 7 which finally hone or polish the blades at thgir cutting edge. By the last set of disks r the honed and polished blades are finally stropped. At the rear end If ofthe machine, the finished razor blades are paid out by the band and may be taken away by any convenient manner.

The feeding of the blades at 8 may either be carried out by hand or in any known automatical manner one after the other.

Evidently the blades, whilebeing operatedon by the whetting disks, are firmly held in a perfectly steady sidewise immov.

able manner, so that keen sharp and regular cutting edges are obtained.

I claim:

1. In a razor blade whetting machine comprising a series of whetting disks, a movable endless metal band, a series of bolts on the metal band standing at a distance apart corresponding to perforations in the blades to be sharpened by the said whetting disks, two guide rails spaced apart a distance equal to the thickness of the blades, one rail being grooved longitudinally to receive the ends of the bolts projecting through the perforations of the blades and the other rail grooved longitudinally corresponding to the crosssection of the metal band.

2. In a razor blade whetting machine comprising a series of whetting disks, two drums, a perforated endless metal band passing around the drums, a series of bolts fitting into the perforations of the metal band and standing at a distance apart corresponding to perforations in the blades to be sharpened by the said whettingdisks, two guide rails spaced apart a distance equal to the thickness of the blades, one rail being grooved longitudinally to receive the ends of the bolts projecting through the perforations of the blades and the other rail grooved longi tudinally corresponding to the cross-section of the metal band, and to the other ends around the drums, a series of bolts on the 7 metal band. standing at a distance apart corresponding to perforations in the blades to be sharpened by the said whetting disks, two guide rails spaced apart a distance equal to the thickness of the blades, one rail being grooved longitudinally toreceive the ends of the. bolts projecting through the perforations of the blades and the other rail grooved longitudinally corresponding to the cross section of the metal band, said rails having gaps therein to allow the whetting disks to pass up to the edges of the blades.

4; In a razor blade whetting machine com- 'prising a series of whetting disks, twodrums, an endless metal band passing around the drums, a series of bolts on the metal band standing at a distance apart corresponding to perforations in the blades to be sharpened by the said whetting disks, and

provided with parallel guiding'faces at one end, two guide rails spaced apart a distance equal to the thickness of the blades, one rail being grooved longitudinally-to receive the "ends of the bolts projecting through the per forations of the blades and the otherrail grooved longitudinally corresponding to the cross-section of the metal band, said rails having gaps therein to allow the whetting disks to pass up to the edges of the blades.

5. In a razor blade whetting machine comprising a series qf whetting disks, two

drums, an endless metal band passing around the drums, a series of bolts on the metal band standing at a distance apart corresponding to perforations in the blades to be sharpenedby the said whetting disks,

the heads of the bolts having parallel sides,

two guide rails spaced apart a distance equal to the. thickness of the blades, one rail being grooved longitudinally to receive the ends of the bolts projecting through the perforations of the blades and the other rail grooved longitudinally corresponding to the cross-sec tion of the metal band.

ERICH KARL FRIEDRICH HEYDENBLUTH. lNitnesses:

EMIL HAGER,

Enuann SIEBRAND. 

